All tools
JSON Formatter
Format, validate and minify JSON — pretty-print it or collapse it to one line.
Parsed and formatted in your browser — nothing is uploaded.
Related PDF tools
XML to PDFPretty-print an XML file and save it as a readable PDF.Markdown to PDFRender a Markdown file or snippet into a clean, formatted PDF.Text to PDFTurn a plain .txt file or pasted text into a tidy PDF.Case ConverterConvert text to UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case and more.
JSON Formatter — frequently asked questions
Is my JSON sent to a server?+
No. It's parsed and formatted entirely in your browser with JSON.parse.
It says invalid JSON — why?+
The message shows where parsing failed. Common causes: trailing commas, single quotes, or unquoted keys — none of which are valid JSON.
Can it handle large files?+
Yes, within your browser's memory. Very large files may be slow to render.
你们会把我的文件上传到服务器吗？+
不会——这里的每个工具都完全在你的设备上处理文件，不会向服务器上传任何内容。唯一的例外是 AI 工具，它们会把提取的文本（而非文件本身）发送给 Claude 来完成工作。
有文件大小限制吗？+
我们没有人为设置限制，但由于处理过程在你的浏览器中进行，非常大的文件（超过 500MB 或 1000 页）会受到你设备内存的限制，而非我们的限制。
Advertisement